Ps4 flashes blue and TV shows no signal?

My ps4 no longer works and looks blue

yesterday I used it normally.

all cables are perfect.

have removed all cables and reconnected after 30sec.

then held the power button down. It beeps and there's a second beep for 12-15 seconds and the ps4 switches off again.

I hear that the ps4 is on but unfortunately the TV does not find anything. Do you have any ideas what I can do?

Did you test with a different HDMI cable all the time?

The wrong cable for the console or the TV is connected.

Jo still didn't go. Had to send it in